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jy40LLY'S.t`JG' A COR" PORATION' <br /> A SUBSIDIARY OF IMPERIAL HOLLY CORPORATION <br /> APR 2 0 1993 WORK PLAN AND SITE SAFETY AND HEALTH PLAN <br /> °FOR OVER-EXCAVATION OF <br /> TWO FORMER UST SITES <br /> ENVIRONMENTAL HEALTH <br /> PERMITISERVI ES <br /> PROJECT SUMMARY *N <br /> 3 +Site History <br /> °In,185"two underground gasoline storage tanks-were removed from the Helly <br /> it Sugar site. One tank contained unleaded gasoline (site A),-and the ether contained <br /> leaded gasoline (site B),.At,the time of removal,soil samples were analyzed and { <br /> found to contain hydrocarbon contamination(both,sites A 13)"And lead <br /> contamination (site B). <br /> ,Site Description rt . <br /> The farmer tank sites are located at the Helly Sugar factory in Tracy, California. <br /> There are two tank sites to be investigated (see attached map). One is located <br /> adjacent to the vehicle maintenance shop(site A),the other is located just East of <br />(; the used oil storage area(site B)., {' <br /> Project Objectives <br /> The objectives'of this project are to aver-excavate the former tank sites and to <br /> determine the extend of sail and groundwater contamination. <br /> ;Field Activities <br /> I ` <br /> Site A will be excavated first on-April 27,1"993,with samples to be collected on April <br /> 28, 1993. Site B will not be excavated until the enol of;the Spring beet processing <br /> campaign because work iu.that-areawould interfere with factory:operations. , <br /> Field activities will include utilizing a backhoe to remove the soil in the former tank- <br />,, site.to the groundwater level (expected to be at;approximately"10 feet), The <br /> excavation will then be de-watered and allowed to recharge with groundwater <br /> overnight. After re-charge,one groundwater sample will be collected along with soil <br /> samples from each of the four walls of theexcavation, <br /> and one sample from the <br /> excavated soil pile (sample location tobe determined by County Health Dept.. <br /> representative).,,All water pumped from the excavation will be stored in a water <br /> truck and disposed ofproperly..- <br /> The soil and groundwater samples will be analyzed for TPH-gasoline using EPA l <br /> method 80115 (modified per LUFT),and EPA 8020 for B'TEX. All sample collection <br /> and analyses will be conducted by a State certified lab. <br /> r <br /> y <br /> 5 <br /> POST{OFFICE BOX 60 e TRACY,CALIFORNIA 95378 <br /> TELEPHONE 2091835-3210 <br /> w w - <br />